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academic & science | chemistry
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Systems Integration Office
governmental | nasa
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Semanticscience Integrated Ontology
miscellaneous | unclassified
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Special Information Operations
governmental | military
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computing | telecom
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Scalable Input/ Output Initiative
computing | general
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business | occupation & positions
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Students Islamic Organisation Of India
academic & science | universities
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miscellaneous | unclassified
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Security Intelligence Operations
miscellaneous | unclassified
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miscellaneous | unclassified
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miscellaneous | unclassified
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Students Islamic Organization Of India
academic & science | universities
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Skidaway Institute Of Oceanography
academic & science | ocean science
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Senior Intelligence Officer
governmental | military
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Student Information Online
academic & science | students
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Societas Internationalis Odontologica
miscellaneous | unclassified
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Senior Investigating Officer
governmental | police
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Students Islamic Organisation
academic & science | students
-
miscellaneous | unclassified
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governmental | nasa
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Standard Installation Organization
governmental | military
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Surety Information Office
business | stock exchange
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Scripps Institution Of Oceanography
academic & science | ocean science
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Strategise Implement Operate
miscellaneous | unclassified
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Social Investment Organization
community
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Surety Information Office
business | accounting
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computing | general
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Studentsamskipnaden I Oslo
academic & science | students
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regional | language codes (3 letters)
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Shock Induced Oscillation
miscellaneous | unclassified
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miscellaneous | unclassified
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Scripps Institute Of Oceanography
govermental | institutes
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miscellaneous | unclassified
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miscellaneous | unclassified
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Smithton, Tasmania, Australia
regional | airport codes